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ADBMS1818ASWZ-R7 bảng dữ liệu(PDF) 57 Page - Analog Devices

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ADBMS1818ASWZ-R7 bảng dữ liệu(HTML) 57 Page - Analog Devices

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Data Sheet
ADBMS1818
THEORY OF OPERATION
analog.com
Rev. 0 | 57 of 89
Bus Protocols
The protocol formats for commands are depicted in Table 46, Table
47, and Table 48. Table 45 is the key for reading the protocol
diagrams.
Table 45. Protocol Key
CMD0
Command Byte 0 (see Table 49)
CMD1
Command Byte 1 (see Table 49)
Table 45. Protocol Key
PEC0
PEC Byte 0 (see Table 44)
PEC1
PEC Byte 1 (see Table 44)
n
Number of bytes
…
Continuation of protocol
Master to slave
Slave to master
Table 46. Poll Command
8
8
8
8
CMD0
CMD1
PEC0
PEC1
Poll Data
Table 47. Write Command
8
8
8
8
8
8
8
8
8
8
CMD0
CMD1
PEC0
PEC1
Data byte
low
…
Data byte
high
PEC0
PEC1
Shift Byte 1 …
Shift Byte n
Table 48. Read Command
8
8
8
8
8
8
8
8
8
8
CMD0
CMD1
PEC0
PEC1
Data byte
low
…
Data byte
high
PEC0
PEC1
Shift Byte 1 …
Shift Byte n
Command Format: The format for the commands is shown in Table 49. CC, Bits[10:0] is the 11-bit command code. A list of all the command
codes is shown in Table 50. All commands have a value 0 for CMD0, Bit 7 through CMD0, Bit 3. The PEC must be computed on the entire
16-bit command (CMD0 and CMD1).
Table 49. Command Format
Name
R/W
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
CMD0
W
0
0
0
0
0
CC, Bit 10
CC, Bit 9
CC, Bit 8
CMD1
W
CC, Bit 7
CC, Bit 6
CC, Bit 5
CC, Bit 4
CC, Bit 3
CC, Bit 2
CC, Bit 1
CC, Bit 0
Commands
Table 50 lists all the commands and their options.
Table 50. Command Codes
Command Description
Name
CC, Bits[10:0] – Command Code
10
9
8
7
6
5
4
3
2
1
0
Write Configuration Register Group A
WRCFGA
0
0
0
0
0
0
0
0
0
0
1
Write Configuration Register Group B
WRCFGB
0
0
0
0
0
1
0
0
1
0
0
Read Configuration Register Group A
RDCFGA
0
0
0
0
0
0
0
0
0
1
0
Read Configuration Register Group B
RDCFGB
0
0
0
0
0
1
0
0
1
1
0
Read Cell Voltage Register Group A
RDCVA
0
0
0
0
0
0
0
0
1
0
0
Read Cell Voltage Register Group B
RDCVB
0
0
0
0
0
0
0
0
1
1
0
Read Cell Voltage Register Group C
RDCVC
0
0
0
0
0
0
0
1
0
0
0
Read Cell Voltage Register Group D
RDCVD
0
0
0
0
0
0
0
1
0
1
0
Read Cell Voltage Register Group E
RDCVE
0
0
0
0
0
0
0
1
0
0
1
Read Cell Voltage Register Group F
RDCVF
0
0
0
0
0
0
0
1
0
1
1
Read Auxiliary Register Group A
RDAUXA
0
0
0
0
0
0
0
1
1
0
0
Read Auxiliary Register Group B
RDAUXB
0
0
0
0
0
0
0
1
1
1
0
Read Auxiliary Register Group C
RDAUXC
0
0
0
0
0
0
0
1
1
0
1
Read Auxiliary Register Group D
RDAUXD
0
0
0
0
0
0
0
1
1
1
1



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